Honestly, I'm more curious as to how you cleaned up the sketch and made it darker. Did you affect this sketch at all using a computer program, or is this a raw scan?
I usually send my scans to a friend and he makes them darker, but they look so gritty, it hurts my eyes...

I don't know who started it, but suddenly all the English-language sites are calling this "Demashitaa..." etc. The final kana character there before the exclamation point is not a small "a" but a small "tsu" which indicates a CLIPPED vowel -- not an extended vowel.

Yes. Cartoon Network has announced collaboration with some Japanese studios to produce original anime (though in this particular case I suppose "original" isn't quite the right word). PPGZ is by Toei. They've already completed a pilot episode. See snapshots from the pilot episode here: [link]